I just installed a set of new plugs, "genuine" Volvo, in a set of 5, Volvo PN: 31361653 in my 2013.
The plugs are labeled Volvo and directly below that. on the ceramic, is the Denso number in orange: FK20HQR8
In Denso's 2015/2016 catalog, this part number is indicated as superseded by: IKH20TT
Are the TT's the ones with small tip hanging down from the ground electrode and the normal tip pointing toward it?
Does anyone have experience with these new plugs in the T5 engine?
I also have read of those swearing against Denso and insisting on original. Well in this case, that would be Denso.
Incidentally, another Volvo blunder, claiming the plugs are good til 70k miles. At 35k, these new plugs made a world of difference in shifting behavior from STOP-1-2